You are buying soccer cleats (shoes) for young female soccer players in your league. You know the mean shoe size and the standard deviation of the shoe chest size. Roughly what proportion of the shoe sizes of the players would you expect to be within one standard deviation of the mean chest size? Choose the best O a. a. 95% Ob. 2/3 O c. 50% if the shoe size is normally distributed. O d. 68% if the shoe size is normally distributed O e. 50% if the mean shoe size is normally distributed